Lock-nut



L. M. SARTAIN.

LOCK NUT.

APPLICATION FILED OCT. 25, 1920.

Patented July 19, 1921;.

Specification of Letters Patent. Application filed October 25. 1920. Serial No.

To all whom it may concern:

c it known that I, LOUIS M. SARTAIN, a

citizen of the United States, residin at elham, in the county of Grundy and tatc of Tennessee, have invented a new and useful Lock-Nut, of which the following is a specification.

his invention means for on a bolt.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains. I

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described being understood that, what is claimed, changes aims to provide efficient preventing a nut from rotating made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in longitudinal section, a device constructed in accordance with the invention, parts appearing in elevation; Fig. 2 is a section on the line 2-2 of Fig. 1. he numeral 1 marks a bolt. A nut 2 is threaded in one direction on the bolt 1, and a screw 8 is threaded in an opposite direction into the end of the bolt 1. 3 has an enlarged head 4 provided with a transverse recess 5. A latch 6 is located in the recess 5 and is movable in the recess, longitudinally of the bolt 1, the latch being provided with terminal projections 7 adapted to cooperate with seats 8 in one end of the nut 2. he numeral 9 designates an operating member or plunger, slidable longitudinally in the head 4 of th porcompression spring in the recess 5, one end of the spring abutting against the head 4, the other end of the spring abutting against the latch 6. At its other end, the plunger 9 carries an enlarged head 12 adapted to bear against Patented July 19, 1921. 419,284.

the end surface of the head 3. On the plunger 9, adjacent to the head 12, there is a rectangular shoulder 14 received against rotation in a recess 15 formed in the end of the head 4 of the screw 3.

he nut 2 is in locked position, the threaded into the bolt 1, the head 4 of the screw latch 6 being advanced by the action of e spring 11 until the projections 7 of the latch are received in the seats 8 of the nut 2, the shoulder 14 of the plunger 19 being eld against rotation in the recess 15 of the head 4.- of the screw. Clearly under the conditions above alluded to, the nut 2 cannot be rotated.

In order to adjust the nut 2, the plunger 9 is pulled outwardly by means of the head 12, in order to retract the latch 6 and to disengage the projections 7 from the seats 8 of the nut 2. he plunger 9 then may rotated through a small are until the rectangular shoulder 14 is not in alinement with the recess 15, the inner end of the shoulder 14 engaging the outer surface of the head 4 and serving to hold the latch 6 retracted, the spring 11 being put under additional compression. When the parts are arranged as last above alluded to, the screw 3 may be rotated out of the bolt 1, wholly or in part, to permit an adjustment of the nut 2 on the bolt. After the nut 2 has been moved to the desired positions, the parts are restored to the positions shown in Fig. 1. aving thus described the invention, what is claimed is In a device of the class described, a bolt; a nut threaded in one direction on the bolt and having oppositely disposed seats; a screw threaded in an opposite direction into the end of the bolt and having an enlarged head engaging the nut; a latch bar movable in the head of the screw longitudinally thereof and having transverse terminal projections cooperating with th to cooperate with the seats; an operating means and connected to the latch and slidable in the head of the screw, the operating member being accessible from the end of the head of the In testimony that I claim the foregoing screw to efl'ect a retraction of the latch, the as my own, I have hereto afiixecl my signaoperatmg member being rotatable, and comture in the presence of two Witnesses. prising a part engaging the head of the LOUIS MABTAIN SARTAIN. screw to hold the operating member and the Witnesses:

latch retracted, after the operating member J. L. ROLLINGS,

has been retracted and. rotated. 1 MAT SARDns. 

